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Research
(Published
online: 09-06-2014)
4. Effect of prill fat supplementation on
hormones, milk production and energy metabolites during mid
lactation in crossbred cows - Mahendra Singh, J. P.
Sehgal, A. K.Roy, S. Pandita and G. Rajesh
Veterinary World, 7(6): 384-388
doi:
10.14202/vetworld.2014.384-388
Mahendra Singh: Division of Animal Physiology, National
Dairy Research Institute, Karnal, 132001 Haryana, India;
chhokar.ms@gmail.com
J. P. Sehgal: Division of Animal Nutrition, National Dairy
Research Institute, Karnal, 132001 Haryana, India; sehgaljp@rediffmail.com
A. K. Roy: Division of Animal Physiology, National Dairy
Research Institute, Karnal, 132001 Haryana, India; royashwani@gmail.com
S. Pandita: Division of Animal Physiology, National Dairy
Research Institute, Karnal, 132001 Haryana, India; sujata.pandita@rediffmail.com
G. Rajesh: Division of Veterinary Physiology, Indian
Veterinary Research Institute, Izatnagar - 243122, Uttar Pradesh,
India
Received: 13-03-2014, Revised: 26-04-2014, Accepted: 03-05-2014,
Published online: 09-06-2014
Corresponding author: Mahendra Singh, email: chhokar.ms@gmail.com
Abstract
Aim: To find out the effect
of prill fat feeding on milk production and hormonal changes in
crossbred cows.
Materials and Methods: Crossbred cows in mid lactation (150
days) were selected from the institutes' herd. The observations on
dry matter intake (DMI), body weight, body condition score (BCS)were
recorded and milk composition, plasma metabolites viz., glucose
and Nonesterified fatty acids (NEFA) were measured in control
(CON) and experimental prill fat group (PFG) cows. During the
experimental period, PFG cows were fed with bypass prill fat @ 75
g/d for a period of 90 days.
Results: The DMI and body weight of cows was
non-significant (P>0.05) between the groups, but BCS of cows
improved in the CON group. Crude protein and Total digestible
nutrients (TDN) intake/kg body weight was more (P>0.05) in PFG
over the CON. Milk yield, plasma hormones - Growth hormone,
triiodothyronine and thyroxine (GH, T3, T4) was significantly
lower in CON group over the PFG cows (P<0.05). However ghrelin and
leptin levels were not affected. Milk fat, protein, lactose and
cholesterol were similar in both the groups. Furthermore, plasma
NEFA decreased (P<0.05) and glucose varied non-significantly
between the groups.
Conclusion: It was concluded that prill fat supplementation
can be used to augment milk production without influencing milk composition
and plasma metabolites in crossbred cows.
Keywords: cows, energy metabolites, hormones, milk yield,
prill fat.
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